You need to Hold down DATA MD and select the right data sub-mode. It is set
per-band.
DATA A is usually the correct sub-mode for FT8. This uses the USB mode.
On 30m, you were likely using the AFSK A mode, which is similar, but uses LSB
mode. AFSK A is used for RTTY, generally.
> On Jun 19, 2021, at 6:40 PM, Carl-N8VZ wrote:
>
> Dear OM or YL: Today I did a successful POTA activation using my K3. I
> usually use a smaller, lower wattage rig, but decided recently to use the K3
> portable. I've used the K3 for POTA activation three times before this week
> -- but all on SSB. Today, I used FT8. I first was on 20M and everything
> was quite normal. Then I switched to 30M, and I was hearing nothing and
> friend who I was texting who lives fairly close to the park wasn't seeing my
> CQs. I had the MODE set to DATA. The friend suggested I switch to USB
> mode, and lo and below I started seeing signals on my screen and completed
> several QSOs. I had used DATA mode on 20M and it worked FB. I also later
> used DATA mode on 40M. Why didn't DATA mode work on 30M? Is there some
> setting where I have to declare USB or LSB for each band separately for DATA
> mode? All of this seems very strange to me. I used my K3 before for data
> modes in the shack, and I don't recall this issue. Any suggestions would be
> greatly appreciated. -- 73 de Carl N8VZ
>
>
>
> --
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